Ice pack



FIG. 1 is a perspective view of an ice pack showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top side view thereof, a bottom side view being identical to the top side view.

Broken lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for an ice pack, as shown and described. 